Integrated Photon Upconversion Dye-Sensitized Solar Cell by Co-adsorption with Derivative of Pt-Porphyrin and Anthracene on Mesoporous TiO2

Tatsuro Morifuji; Yuya Takekuma; Morio Nagata

doi:10.1021/acsomega.9b01210

Integrated Photon Upconversion Dye-Sensitized Solar Cell by Co-adsorption with Derivative of Pt-Porphyrin and Anthracene on Mesoporous TiO₂

ACS Omega. 2019 Jun 28;4(6):11271-11275. doi: 10.1021/acsomega.9b01210. eCollection 2019 Jun 30.

Authors

Tatsuro Morifuji¹, Yuya Takekuma¹, Morio Nagata¹

Affiliation

¹ Department of Industrial Chemistry, Graduate School of Engineering, Tokyo University of Science, 12-1 Ichigaya-funagawara, Shinjuku, Tokyo 162-0826, Japan.

Abstract

Photon upconversion via triplet-triplet annihilation (TTA-UC) is a process that converts two lower-energy photons to a higher-energy photon, which is expected to increase the maximum solar cell efficiency beyond the Shockley-Queisser limit. To incorporate TTA-UC into a dye-sensitized solar cell (DSSC), we used a co-adsorption approach, in which both a TTA-UC donor with an alkyl carboxylic acid chain and a TTA-UC acceptor dye were adsorbed onto mesoporous TiO₂. Incident photon-to-current conversion efficiency spectra and excitation intensity dependence indicated that a photocurrent was generated under irradiation at wavelengths above 490 nm by the TTA-UC mechanism. The power-conversion efficiency of the DSSC was increased to 0.72%, and the photocurrent contributed by TTA-UC was 0.036 mA cm^-2 under 1 sun irradiation.